{"data":{"id":"us/40-cfr-87.31","jurisdiction":"us","citation":"40 CFR 87.31","heading":"Exhaust emission standards for in-use engines.","body":"Exhaust emission standards apply to in-use aircraft engines as described in 40 CFR 1031.60.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 87—CONTROL OF AIR POLLUTION FROM AIRCRAFT AND AIRCRAFT ENGINES"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"703f68c8a8315279b032534f46f7275e69899504fef74985c4024488771323a0","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-87.23","next":"us/40-cfr-87.48"},"notice":"GroundRules: Original legal text. Not legal advice."}